South Main Street at 109th Street.(Camilo José Vergara)

The sunny Los Angeles of popular imagination becomes a very different place after nightfall. After 2 am, the city’s poorer neighborhoods become especially desolate and unfamiliar. The number of stray cats easily matches that of people on the streets. I have visited these neighborhoods and their residents during the daytime for decades, witnessing their evolving forms in detail. But this time, I wanted to allow my imagination to play freely with the city at night, to experience these neighborhoods in the darkness, at a time when dreams and reality may merge.

A woman sleeps at Casa Shalom, New Hampshire Street.(Camilo José Vergara)

A few of my encounters were with police officers. One was a very short, middle-aged Latino officer in Compton who stopped me and shined his flashlight from above to examine my eyes. Reassured that I was not drunk or on drugs, he asked me if I was the pastor of the church across the street. I felt a jump in my status from potential outlaw to a man of God. I could not help noticing his prominent set of false teeth, which gave an eerie feeling to the proceedings. Another time, seeing me standing on the roof of a car, a policeman driving by Broadway in South LA stopped and asked: “What are you doing there?” He then took a picture of me and left with a warning: “Somebody is going to come and steal your car.”

Streetwalkers aggressively approached me as I stopped to photograph, forcing me to get back inside the car and drive off. One in South LA took me by surprise while looking at the photos I had taken. She placed her heavily made-up face inches away from mine. Lit from above by a streetlight, it looked like the face of a dead person.

Freshly painted faces on murals, on the other hand, become intensely alive in the darkness. I am attracted to the growing number of images of minority heroes and heroines such Archbishop Óscar Romero, Barack Obama, and Frida Kahlo. I am also attracted to the perennial Dr. Pacheco Naturalmente, purveyor of health and diet products, whose smiling portrait hangs above his store on South Alvarado Street, across from MacArthur Park, where it has been seen by hundreds of thousands of people over the course of some 10 years. I drove onto the sidewalk—something I would not do during the day—and from the roof of the car photographed this iconic alternative LA celebrity. An apparently homeless man passing by asked, “What are you doing? Why are you taking pictures of people?”—the portrait had basically become a person, and possibly the night helped animate it.

A memorial to Ezell Ford Jr., 85th Street at South Broadway.(Camilo José Vergara)

Memorials to recent victims of street violence are lit by candles. At 4:30 am, my photographic activity woke up a woman who lives next door to a memorial to Ezell Ford Jr., on South Broadway. Appearing on the balcony, she took it upon herself to inform me that Ezell was her cousin and that on August 11 of 2014 the police had shot him. Her voice, although calm, took me by surprise.

Uncle Bruce at a memorial to his nephew Byron, aka Boss Hogg, Norris Avenue at Mercer Street.(Camilo José Vergara)

In Pacoima, while photographing a memorial to “Boss Hogg,” I woke up his uncle Bruce, who was sleeping in a car across the street. Out of the blue, Bruce asked me for money to help bury his nephew, and I gave him a few dollars.

Antonia and Estela at the Church of Christ, South San Pedro Street at Imperial Highway.(Camilo José Vergara)

At 4:50 am, I encountered Antonia and Estela, who were waiting to get two bags of free food at the Church of Christ on South San Pedro Street. They explained that they had arrived there early in the hopes of getting a chicken, since the food pantry has only a few to give away.

Will collecting cans at the Sixth Street Bridge.(Camilo José Vergara)

Los Angeles wakes up earlier than other cities. Food vendors wait at their posts, cooking for the breakfast crowd. As early as 4 am, people are waiting for the bus, ready for a long commute to work and to drop children off at day-care centers. At 4:50, I drove to the LA River to see the dawn. A man named Will was collecting cans, taking advantage of the raised water level caused by the rain to catch them floating by. Although at first I was afraid of him, he asked me in a friendly way if I liked the rain.

Javier on South Broadway.(Camilo José Vergara)

At 5 am on South Broadway, I encountered Javier, 43, originally from Jalisco, Mexico, another can and bottle collector. Javier is homeless and makes $20 a day collecting. He assembled a vehicle for his work that consisted of several shopping carts covered with colorful rugs to protect against the rain and sun. During the day, he told me, amused children follow him as he slowly walks down the sidewalk in the middle of his conveyance, as if in a tank on parade. His brother, a construction worker, wants him to come live with him and get a regular job, but Javier prefers wandering.

Iglesia La Luz del Mundo, Van Nuys Boulevard.(Camilo José Vergara)

Worship starts early in the day, and at night there are vigils. On Van Nuys Boulevard in the Pacoima neighborhood, Iglesia La Luz del Mundo opens for a service at 5 am. Inside, the minister preaches to a congregation of men on the left, women on the right.

On Stanford Avenue, Skid Row, I spotted two inebriated men, Bada and Sam, coming out of a techno party at 6 am. They talked while waiting for an Uber driver to pick them up in front of a fortified building between two homeless tents. I asked them what they do. Bada replied, “Until now, nothing that I am proud of.”

Bada and Sam on Stanford Avenue.(Camilo José Vergara)